Here are some cheats and tips for the game Biker Mice From Mars.
$30,000:
Enter _, Square, _, X as a password, where “_” represents a space.
Super hard difficulty level:
Press Up, X, Left, Y, Down, B, Right, A, Up, X on controller two at
the main menu. A laugh will confirm correct code entry. Select main
race or battle mode to display the new difficulty option.
Passwords:
_, Triangle, Square, _
X, Square, _, Circle
Square, Diamond, Diamond, V